Whitest Kids U' KNow

I'm mid-interview with Sam Brown and Zach Cregger from the sketch comedy troupe The Whitest Kids U'Know, searching for the words that might explain what makes them hilarious, as if they needed one more testimonial. They don't, of course — their IFC show and millions of YouTube video fans are proof that something they're doing is working. But what is it, exactly, that runs through all of their sketches?

For one, they know when to not say "When." They'll often take ideas and extend them and milk them until no surplus jokes remain, and then they'll milk it a bit more.